Submitted to: Society for Experimental Biology Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 4/1/2006
Publication Date: 4/1/2006
Citation: Bohan, M.M., Foote, M.R., Nonnecke, B.J., Trenkle, A.H., Beitz, D.C. 2006. Plane of nutrition affects appetite-related hormones in neonatal calves [abstract]. Experimental Biology 2006. Paper No. 131.6. Interpretive Summary:
Technical Abstract: Investigating different planes of nutrition on appetite-related hormones could provide knowledge into the role of these hormones on growth performance in neonatal calves. The objective of the current study was to investigate the effects of three different feeding rates to achieve three targeted growth rates on ghrelin in plasma. Treatments (n = 8 per treatment) were designed to achieve three targeted daily rates of gain (No Growth = 0.0 kg, Low Growth = 0.55 kg, or High Growth = 1.2 kg) in live weight over a 7-week period. All calves were fed a 30% crude protein, 20% fat all-milk protein milk replacer reconstituted to 14% dry matter. The daily growth rates for No, Low, and High Growth calves were different (P < 0.001) throughout the experimental period and averaged 0.11 +/- 0.02 kg, 0.58 +/- .02, and 1.16 +/- 0.04 kg, respectively. Fasting ghrelin concentration was significantly higher in the No Growth calves over the 7-week period in comparison to the Low and High Growth calves (P < 0.0001). Circulating concentration of ghrelin in neonates fed different planes is similar to observed responses to feed intake level in adults. These results indicate a relationship of appetite-related hormones with respect to plane of nutrition and growth rate in neonates.